Thu, 14 Jun 2012 15:38 CDT
On June 14th, for the second day in a row, sunspot AR1504 erupted and hurled a CME toward Earth. The fast-moving (1360 km/s) cloud is expected to hit
our planet's magnetic field on June 16th at 14:00 UT, possibly sparking a geomagnetic storm. High-latitude sky watchers should be alert for auroras.
Active sunspot AR1504 erupted on June 13th at 1319 UT, producing a long-duration M1-flare and hurling a CME into space. According to analysts at the Goddard Space Weather Lab, the cloud will deliver a glancing blow to three planets: Venus on June 15th, Earth on June 16th, and Mars on June 19th. This animation shows the likely progression of the cloud.